Electrical wiring colour codes red which color colours ve dc rail 0v power electronics wikipedia info article here stack Mercury outboard wires 2005 diagrams optimax harness engineering Electrical wiring color coding system
wiring - Red for +ve, black for 0v,which colour for -ve rail
Electrical Wiring Color Coding System - Engineering Discoveries
wiring - Red for +ve, black for 0v,which colour for -ve rail